Brooks Hi Fi speakers Foot Pedal

1) An effects device where the amount of the effect can be controlled by a musician with his foot.
2) The beater mechanism of a foot drum that is activated by the drummer's foot to play the drum.
3) Any device, like a volume control, that can be operated by the foot.

Fundamental
The tuned frequency and (almost always) the lowest frequency that is present in the sounding of a pitch by a musical instrument.

Brooks RM 909 Kick (Kick Drum)
Another term for Bass Drum.

Line In (Input, return)
Where a signal enters the board or component.

Brooks Hi Fi reviews Capacitance
That property of a capacitor which determines how much charge can be stored in it for a given potential difference between its terminals, measured in farads, by the ratio of the charge stored to the potential difference.

Hz (Hertz)
1) An abbreviation for the term Hertz (the unit of frequency).
2) Unit of frequency equivalent to the number of cycles per second.

Isolation Booth/ Isolation Room
A room that prevents loud sounds from other instruments from leaking in: an isolation booth is usually a smaller room that could be used for only one musician.

Compressor
A signal processing device that does not allow as much fluctuation in the level of the signal above a certain adjustable or fixed level.